/*
 * JEF - Copyright 2009-2010 Jiyi (mr.jiyi@gmail.com)
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package jef.database.jsqlparser.expression;

import java.math.BigDecimal;

import jef.database.jsqlparser.visitor.Expression;
import jef.database.jsqlparser.visitor.ExpressionType;
import jef.database.jsqlparser.visitor.ExpressionVisitor;
import jef.database.jsqlparser.visitor.SqlValue;

/**
 * Every number without a point or an exponential format is a LongValue
 */
public class LongValue implements Expression, SqlValue {

	private long value;

	private String stringValue;

	public LongValue() {
	}

	public LongValue(String value) {
		if (value.charAt(0) == '+') {
			value = value.substring(1);
		}
		this.value = Long.parseLong(value);
		this.stringValue = value;
	}

	public LongValue(String valueStr, boolean inverse) {
		long value = Long.parseLong(valueStr);
		if (inverse) {
			value = -value;
		}
		this.value = value;
		this.stringValue = String.valueOf(value);

	}

	public LongValue(long value) {
		this.value = value;
		this.stringValue = String.valueOf(value);
	}

	public void accept(ExpressionVisitor expressionVisitor) {
		expressionVisitor.visit(this);
	}

	public Long getValue() {
		return value;
	}

	public void setValue(long d) {
		value = d;
	}

	public String getStringValue() {
		return stringValue;
	}

	public void setStringValue(String stringValue) {
		this.stringValue = stringValue;
	}

	public String toString() {
		return stringValue;
	}

	public static final LongValue L0 = new LongValue(0);
	public static final LongValue L1 = new LongValue(1);

	public void appendTo(StringBuilder sb) {
		sb.append(stringValue);
	}

	public ExpressionType getType() {
		return ExpressionType.value;
	}

	public Object formatNumber(BigDecimal negate) {
		return negate.longValue();
	}
}
